Abstract: A novel use of trajectory linearization control (TLC) method was introduced in the guidance law design for hypersonic vehicle entry flight. By exploiting the inherent characteristics of time scale separation of entry vehicle dynamics, altitude and velocity could be controlled separately via outer an...
Abstract: The exact solutions for transverse free vibrations of a clamped plate were adopted as the modal coordinates to solve the given electromechanical coupled kinetic equations of clamped piezo electro mechanical-plate in modal space. After the computational analysis was conducted for harmonic response of...
Abstract: Aiming at the poor adaptability of expert system in air combat, a maneuvering decision algorithm based on the receding horizon control (RHC) method was proposed to improve the air combat maneuvering decision-making expert system. Firstly, the optimal control problem was systematically analyzed in th...
Abstract: Based on the motorized momentum exchange tether (MMET), with the principle of momentum exchange and by considering the structural deviation (including the tether length deviation and payload mass deviation), the two dimensional error dynamics of continuous cislunar payloads transferring system (CCPT...
Abstract: In order to further improve the dynamic and energy-economic performance of air suspension, a closed-loop air circuit laterally interconnected air suspension structure which combines the advantages of both interconnected air suspension system and closed-loop air circuit air suspension height control ...
Abstract: In underwater imaging, the light ray associated with each scene point goes through different media with different refractive indices, which introduces refractive distortion in underwater images. Such distortion reduces the accuracy of image-based 3D reconstruction based on traditional single viewpoi...
Abstract: A modeling and numerical calculation method for the dynamics of the rigid-body in planar motion with contact, impact, symmetric and non-symmetric Coulomb's dry friction was presented based on the theory of contact mechanics and the arithmetic of linear complementarity problem (LCP). The local deform...
Abstract: Four kinds of titanium-based filler metals, Ti-5Zr-15Cu-15Ni, Ti-10Zr-15Cu-15Ni, Ti-15Zr-15Cu-15Ni and Ti-25Zr-15Cu-15Ni, were fabricated by electric arc melting method, and the four kinds of filler metals were used for vacuum brazing of Ti-6Al-4V plate lap joints. The melting characteristic and wet...
Abstract: It is very important for aircraft flight safety to accurately measure the remaining fuel in each fuel tank in real time. An aircraft fuel measurement sensor optimal layout method based on particle swarm optimization (PSO) was designed to improve aircraft fuel measurement accuracy. Firstly, the conce...
Abstract: Radiation risk of astronauts during the flight in low earth orbit (LEO) and deep space exploration is mainly from the exposure of galactic cosmic ray (GCR). The radiation dose from GCR is the basis for the assessment of astronauts' radiation risk. In 2013, a new estimation method for the assessment ...
Abstract: During the design of drilling and coring mechanism for lunar exploration, a coring method based on a flexible tube can obtain slim continuous sample core, which enables high coring rate and preserves the stratification information of the subsurface samples. Since the complex movement of lunar soil p...
Abstract: Spacecraft external heat flux is very important for researching deterioration law of thermal control coating on orbit, influence of various spatial factors on thermal control products, as well as plume thermal effect of spacecraft attitude and orbit control engine. However, there are many difficulti...
Abstract: Integration modular avionics (IMA) system application development with Harmony system engineering (SE) modeling method was introduced, Rhapsody was used as the system design tool with Harmony profile to create a software model based on the IMA application requirements, and the system use case diagra...
Abstract: Aiming to the issue that the angle of attack was usually fixed rather than pitched-up in the previous researches about the wing rock induced by forebody asymmetric vortices, series of wind tunnel experiments were conducted in Beihang University D4 wind tunnel over the configuration of a pointed ogiv...
Abstract: To meet the ADS-33E-PRF flight quality and effectively overcome the influence of external disturbance, an attitude control strategy based on a linear active disturbance rejection control (LADRC) is proposed for helicopter. Flight dynamics model of UH-60A and the wind model were established. UH-60A w...
Abstract: Aimed at the problem of exoatmospheric kinetic kill vehicle(KKV) guidance law design for intercepting targets, a novel missile sliding mode guidance law with nonlinear disturbance observer (NDO) was derived base on collision course. Through steering angle of attack of missile, the direction of veloc...
Abstract: As a forebody of hypersonic vehicle which was powered by air-breathing scramjet, waverider not only showed its excellent aerodynamic performance, but also played the role of pre-compression to incoming flow for hypersonic vehicle. In order to further enhance the waverider forebody's pre-compression ...
Abstract: Drilling sample of lunar soil over depth of 2 m is the most important object of the third stage of China's lunar exploration project. For performance test and security validation of the drilling process, it is necessary to simulate a vacuum thermal environment which is close to lunar surface and the...
Abstract: A novel method for a random moving target coordinated standoff tracking was proposed to maximize the target position estimation precision by two unmanned aerial vehicles (UAVs) equipped with only bearing sensor. The analytical relationship model between the UAV observation geometry configuration and...
Abstract: Extension case-based reasoning is a kind of knowledge reasoning method which is the combination of the extenics and case-based reasoning. Firstly, the representation of extension case using compound element was introduced, and the similarity computing method of fault symptom with interval value was ...
Abstract: According to the control problem of a class of uncertain multiple-input multiple-output (MIMO) nonlinear systems, an adaptive decoupling control approach based on fuzzy neural networks was proposed. Firstly, a sub-channel decoupling control law of MIMO nonlinear systems was designed using decentrali...
Abstract: The removal strategy of space debris is one of the most key technologies to achieve the goal of clearing space debris in a wide range of sizes from 1 to 10 cm actively using ground-based lasers. In order to develop an effective strategy for removing space debris, we firstly studied on the influences...
Abstract: The special structure of drum type compressor of aero-engine, which can be simplified as a thick-disk rotor system whose radial moment of inertia is greater than the axial one, has two inherent frequencies when whirling forward. Transient response to unbalance exciting force of single, thick-disk ro...
Abstract: MoS2/Graphene electrocatalysts which were used for water-electrolytic hydrogen making were synthesized using a hydrothermal method among which NH2CSNH2(thiourea) was served as both the source of sulfur and the reductive agent. MoS2/Graphene films prepared on fluorine-doped tin oxide (FTO) by spin co...
Abstract: GO methodology was an effective method of evaluating the reliability and the security of complex systems. Besides the capability to describe the sequence characteristics of multi-states, GO methodology was also capable of expressing complex dynamic repair behavior of the systems. For GO methodology ...
Abstract: Attack angle is one of the key parameters to the cross-flow instability of swept-wing boundary layers. For swept NACA0012 airfoil with infinite spanwise length, the basic flow field was calculated by solving the three-dimensional compressible Navier-Stokes equations numerically, the neutral curve an...
Abstract: Based on the practical requirements on the research of the roll maneuver control of robotic fish propelled by oscillating pectoral fins, a central pattern generator (CPG) based fuzzy control method was presented. Pectoral fins oscillating disciplines which drive the robotic fish roll were obtained b...
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Sponsor: Ministry of Industry and Information Technology of the People's Republic of China
Sponsored by: Beijing University of Aeronautics and Astronautics